The 1984 All Japan Endurance Championship was the second season of the All Japan Sports Prototype Championship. The 1984 champion was the Auto Beaurex Motorsport Lotec M1C-BMW driven by Naoki Nagasaka.
All races were held in Japan.
| Round | Race | Circuit | Date |
|---|---|---|---|
| 1 | International Suzuka 500 km | Suzuka Circuit | 1 April |
| 2 | RRC Tsukuba 4 Hours | Tsukuba Circuit | 1 July |
| 3 | International Suzuka 1000 km | Suzuka Circuit | 30 August |
| 4 | WEC-Japan | Fuji Speedway | 30 September |
Season results are as follows: [1]
| Round | Circuit | Winning team |
|---|---|---|
| Winning drivers | ||
| 1 | Suzuka Circuit | #1 Trust Racing Team Porsche 956 |
| | ||
| 2 | Tsukuba Circuit | #33 Team Taku Mazda 83C |
| | ||
| 3 | Suzuka Circuit Report | #19 Team Nova Porsche 956 |
| | ||
| 4 | Mt. Fuji Report | #2 Rothmans Porsche 956 |
| | ||
| Rank | Drivers | Number/Team | Points | Wins |
|---|---|---|---|---|
| 1 | | #10 Auto Beaurex Motorsport Lotec M1C-BMW #62 Auto Beaurex Motorsport Lotec M1C-BMW #84 Auto Beaurex Motorsport Lotec M1C-BMW | 48 | 0 |
| 2 | | 48 | 0 | |
| 3 | | #1 Trust Racing Team Porsche 956 #60 Trust Racing Team Porsche 956 | 47 | 1 |
| 4 | | #1 Trust Racing Team Porsche 956 #17 Mazdaspeed March 84G | 35 | 1 |
| 5 | | #33 Team Taku Mazda 83C #31 Team Taku Mazda 83C #83 Shimegi Racing Team Mazda 83C | 33 | 1 |